BOAT & STREAM

 

1.         A man can row upstream at 10 km/hr and downstream at 16 km/hr. Find the men’s rate in still water ?

(A) 10 km/hr              

(B) 3 km/hr                 

(C) 13 km/hr               

(D) 14 km/hr

 

2.         A man swims downstream 30 km and upstream 18 km, taking 3 hrs each time. What is the velocity of stream ?

(A) 6 km/hr                

(B) 12 km/hr               

(C) 2 km/hr                 

(D) 4 km/hr

 

3.         A man can row 6 km/hr in still water. It takes him twice as long to row up as to row down the river. Find the rate of the stream ?

(A) 6 km/hr                

(B) 3 km/hr                 

(C) 2 km/hr                 

(D) 4 km/hr

 

4.         A man can row 6 km/hr in still water. When river is running at 1.2 km/hr, it takes him 1 hr to row to a place and back. How far is the place ?

(A) 6 km                     

(B) 5.76 km                

(C) 2.76 km                

(D) 2.88 km

 

5.         A man can row 7 km/hr in still water. In a stream which is flowing at 3 km/hr, it takes him 7 hrs to row to a place and back. How far is the place ?

(A) 40 km                   

(B) 42 km                   

(C) 49 km                   

(D) 20 km

 

6.         In a stream running at 2 km/hr, a motorboat goes 10 km upstream and back again to the starting point in 55 minutes. Find the speed of the motorboat in still water ?

(A) 40 km/hr              

(B) 22 km/hr               

(C) 20 km/hr               

(D) 30 km/hr

 

7.         A man can row 30 km upstream and 44 km downstream in 10 hrs. Also, he can row 40 km upstream and 55 km downstream in 13 hrs. Find the rate of the stream and the speed of the man in still water ?

(A) 3 km & 8 km/hr               

(B) 4 km & 8 km/hr                

(C) 4 km & 7 km/hr    

(D) 2 km & 9 km/hr

 

8.         A boat covers 24 km upstream and 36 km downstream in 6 hrs, while it covers 36 km upstream and 24 km downstream in 6.5 hrs. Find the velocity of the stream ?

(A) 4 km/hr                

(B) 2 km/hr                 

(C) 3 km/hr                 

(D) 4 km/hr

 

9.         Ramesh can row a certain distance downstream in 6 hrs and return the same distance in 9 hrs. If the stream flows at the rate of 3 km/hr, find the speed of Ramesh in still water ?

(A) 16 km/hr              

(B) 20 km/hr               

(C) 15 km/hr               

(D) 11 km/hr

 

10.       The speed of a boat in still water is 6 km/hr and the speed of the stream is 1.5 km/hr. A man rows to a place at a distance of 22.5 km and comes back to the starting point. Find the total time taken by him ?

(A) 4 hr                      

(B) 2 hr                       

(C) 6 hr                       

(D) 8 hr

 

11.       A boat running downstream covers a distance of 16 km in 2 hrs while for covering the same distance upstream, it takes 4 hrs. What is the speed of the boat in still water ?

(A) 4 km/hr                

(B) 6 km/hr                 

(C) 8 km/hr                 

(D) Data inadequate

 

12.       A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is?

(A) 2 : 1                      

(B) 3 : 1                      

(C) 3 : 2                      

(D) 4 : 3

 

13.       If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 km/hr, then the speed of the boat in still water ?

(A) 4.2 km/hr             

(B) 9 km/hr                 

(C) 13 km/hr               

(D) 21 km/hr

 

14.       If a man rows at rate of 5 km/hr in still water and his rate against the current is 3.5 km/hr, then the man’s rate along the current ?

(A) 4.25 km/hr           

(B) 6 km/hr                 

(C) 6.5 km/hr              

(D) 8.5 km/hr